貫流式波力タービンに関する数値計算

抄録

Cross flow turbines for the Oscillating water column were simulated by LES analysis. The equations are discretized by Finite volume method for space and Fractional step method for time. In this study, Shapes of duct are point symmetry and shapes of oscillation are sine wave. Important parameters of ducts are curvature and position of tongue. The following are conclusions of analysis. Maximum efficiency under oscillating flow was 66.9%, and it is 3% lower than the efficiency of steady flow. Efficiency of quasi steady analysis was overestimation for every duct. Estimation based on steady flow or quasi steady analysis has a risk what lead to improper duct shape.